Shedding mechanism for looms.



No. 71|,39L

A. c. FISCHER.

SHEDDING MECHANISM FUR LOOMS.

(Application tiled Oct. 5, 1901.)

Patented Ut. I4, |902.

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Nq. 7||,39|. Patented lct. I4, |902.

A. c.-F|scH|-:n'. SHEDDING ,MECHANISM FOR'LOOMS.

(Ap'plication med oct. u, 1901,.) (No Model.)

3 Sheets-Sheet 2.

cZ/zurjsoherlgaagm by I l V l UNTTED STATES PATENT OFFICE.

ARTHUR C. FISCHER, OF SOUTH BETHLEI'IEM, PENNSYLVANIA.

SHEDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 711,391, dated October14, 1902.

Application iled October 5, 1901. Serial No. 77,718. (No model.)

fand State of Pennsylvania, have invented a new and useful SheddingMechanism for Looms, of which the following is a specification. Y

My invention relates to certain improvements in looms, and particularlythat portion of the mechanism employed to raise and lower the harness. l

The principal object of the invention is to construct an improvedshedding mechanism of simple character in which the work will be dividedin order to reduce strains on any one part of the mechanism, insuring aneasy and noiseless operation and at the same time effecting positivemovements of the various parts.

With this and other objects iu View the invention consists in the novelconstruction and combination of parts hereinafter described, illustratedin the accompanying drawings, and particularly pointed out in theappended claims.

In the accompanying drawings, Figure 1 is a side elevation of a sheddingmechanism constructed in accordance with my invention. Fig. 2 is asimilar view looking from the opposite side of the machine. Fig. 3 is aplan View of the device. Fig. 4 is a sectional elevation in the natureof the diagram illustrating the operation of a portion of the mechanism.Fig. 5 is an end elevation of the crank mechanism which I employ forconnecting the device to the loom. Fig. 6 is a sectional elevation ofthe same. Fig. 7 is a detail view of the hook-lifting bar.

The various parts of the mechanism are supported in a frame 1, having atits lower portion suitable openings or slots 2 for connecting it bybolts to the loom-frame, the device being secured in the usual positionand receiving its motion from the crank or other shaft of the loom.

Extending transversely of the frame is a Xed shaft 3, forming a fulcrumfor a series of double-ended harness-jacks 4, having at their upper andlower ends suitable recesses 5 for connection by cords or wire to theupper and lower portions of the harness. The jacks are of course equalin number to the number of heddles, one jack being connected to eachheddle. y

In suitable bearings 7, arranged on opposite sides of the machine, are aseries of rack-bars 8, 9, 10, and 11, a similar set of bars beingarranged on each side of the machine and the similar bars beingconnected, respectively, by the knives 8', 9', 10', and 11. Arrangedcentrally between the rack-bars 8 and 9 on each side of the machine is afixed stud 12, carrying a pinion 13, intermeshing with the teeth of bothof the racks, and in similar manner a stud 14 is provided on each sideof the machine between the racks 10 and 11, and said stud 14 forms abearing for a pinion 15, intermeshing with the teeth of the rack-bars 10and 11. Extending transversely of the frame and adapted to suitablebearings therein is a rock-shaft 16, to which are secured 1evers 17, oneon each side of the machine, and the opposite ends of said levers areconnected by rods 18 to the rack-bars 9 and 10. The connection betweenthe levers 17 and rods 18 is slotted in order to permit of the necessaryadjustment for regulating the degree of movement imparted to therack-bars.

The levers 17 are oscillated by means of a lever 19, secured to therock-shaft 16 at'one side ofthe machine and having its outer endconnected by a suitable pitman to the camshaft of the loom, the leverbeing oscillated at each pick and imparting to the rack-bars areciprocatory movement, the bars 8 and 10 moving simultaneouslyin onedirection, and the bars 9 and 11 receiving" simultaneous movement in theopposite direction.

The knives carried by the various rackbars are adapted to engage on twosets of hooks 20, one set being arranged above and the other below thepivot-point of the jacklevers. Each set comprises a pair of hooks therear ends ofwhich engage in suitable openings in a hook-bar 21, thelatter being pivotally connected at 22 to the jack-levers.

The fulcrum-point of the jacksis about midway of the vertical distancebetween the pinions 13 and 15, and thelconnections between the hooks andjacks are such that the jacks will receive the same movement in both di-IOO rections, the harness being raised to form the upper portion of theshed or lowered to form the lower portion of the shed and the movementin each case being to the same distance from the central line of theshed.

The selecting mechanism is of the usual type, comprising a cylinder 25,adapted to receive the usual perforated pattern-cards, the cylinderoperating on needles 26, extending in vertical line and having suitableeyes for the reception of the hooks 20. The shaft of the cylinder 25 isguided in vertical slots 27 at opposite sides of the frame and isconnected by a link 28 to a lever 29, mounted on a I5.

rock-shaft 30 and adapted to be operated from the cam-shaft of the loomat each pick. The cylinder is turned by a hook 31, pivoled at 32 to theframe and operatingin the usual manner.

Each needle 26 is provided about midway of its length with anoutwardly-bentloop 33, which extends over a transverse bar 34, adaptedto suitable guiding-slots 35 in the opposite sides of the frame. Thisbar is provided with an engaging hook or handle 34', by which it may beshifted longitudinally, and on the under surface of the bar arecam-faces 35', which when the bar is moved by pulling on the hook willengage with the lower walls of the slots 35, elevating the bar andraising all of the needles from operative contact with the card-cylinderand causing the elevation of all of the hooks 2O to a point above theknives.

After each pick the shed is closed and the harness-jacks are moved to amid or vertical position in readiness to be again moved in the same orin an opposite direction, as may be dictated by the pattern. Toaccomplish this, I employ the following mechanism:

In the opposite sides of the frame are horizontally-disposed slots 37,38, 39, and 40, and guided in these slots are transversely-disposedclosing-bars 37', 38', 39', and 40'. These bars are adapted to engagewith verticallyarranged shoulders 41, formed on the hookbars 31, and aremoved immediately after each pick in the direction of the rack-bars inorder to return to the mid-position any previously-moved harness-jack.Extending transversely of the machine are two concentric shafts 42 and43, the inner shaft 42 being provided at each side of the machine with arocklever 44, connected .by suitable links 45 to the ends of theclosing-bars 37' and 40'. On the tubular shaft 43 at each side of themachine are secured rocking levers 46, connectred by links 47 to theclosing-bars 38' and 39',

all of the connections between the rock-levers and links being slottedfor purposes of adjustment.

In the frame of the machineare journaled two shafts 48 and 49, to one ofwhich is secured an arm 50, the outer end of which is connected by a rod51 to the rocking lever 46. On the shaft 49 is secured a similar arm51', connected by a rod 52 to the rocking lever 44, and all of theseconnections are slotted, so that the degree of motion imparted may beaccurately adjusted. The arms 50 and 51 are each provided with segmentalracks arranged on lines concentric with the centers of their respectivecarrying-shafts, the teeth of such racks inte'rmeshing, as shown. i Onthe shaft 49 is secured a lever 55, the outer end of which is connectedto the cam-shaft of the loom and receives motion therefrom immediatelyafter each pick.

The operation of the mechanism is` as follows: The hooks in engagementwith the knives 8' and 10' will make the shedding for the first pick andthe hooks in engagement with the knives 9 and 11' will make the sheddingfor the second pick. When the knife 8' is engaging any of the hooks, thehooks adapted to coact with the knives 10' and 11' must be raised out ofengagement with said knives. When the parts a're in the positionillustrated iu Figs. 1 and 4, with the harness-jacks in vertical lines,the heddles are in mid-position and the shed is closed. Thepattern-cylinder has been operated and the proper needles have beenraised to elevate such of the hooks 2O as are not to be operated ou fromthe path of the various knives. Motion being imparted to the lever 19 ina downward direction, the rack-bars 9 and 11 are drawn inwardly and themating rack-bars 8 and 10 are forced in an outward direction, such ofthe hooks 20 as may be engaged with the knives 8' and 10' being drawnout with said knives, the movement of the upper hooks drawing one ormore of the harness-jacks to the rear and elevating the attached heddleor heddles. Outward movement of the lower hooks results in a lowering ofthe heddles to which they are connected. During the movement of theknives the bars 37', 38', 39', and 40' will move to a position midway ofthe length of their respective slots, this being the limit of outwardmovement of the shoulder 41. The shed being thus open, a pick is madeand the closing bars are operated to force the hook-bars outwardly or inthe direction of the needles and eect the return of all of theharness-jacks to the initial position, the shed being again closed.During this operation the card-cylinder has been turned to the eX- tentof one-fourth of a revolution and has been raised to select the properhooks for the .ing longitudinally slotted and adapted for the receptionand support of a crank-pin 61, to which is connected the lower end of apitman 62, extending to the lever 19. To the outer end of the crank-pin61 is secured a IOO IIO

segment 59, having a segmental slot GO, the adjacent faces of thesegment and the end of the crank-pin being slotted or grooved in orderto provide for the proper locking` of the two in an adjusted position.Adjustably secured in the slot (30 is a pin 63, from which extends apitman 64: to the outer end of the lever 55. All of the parts are thusadjustably connected to permit the proper timing of the movements of thetwo levers.

While the construction herein described and illustrated is the preferredform of the device, it is obvious that many changes in the form,proportions, and minor details of the structure may be made withoutdeparting from the spirit or sacrificing any of the advantages of myinvention.

Having thus described my invention, what I claim isl. Ina sheddingmechanism, the .combination with the pivoted jack-levers, of two sets ofhooks, one arranged above and the other below the pivot-point of thejack-levers and each set comprising a pair of hooks, means forconnecting the hooks to the jack-levers, knives for engaging one oftheupper and one of the lower pairs of hooks at each operation, mechanismfor reciprocating said knives, a pattern mechanism for moving selectedhooks from the path of travel of the knives, and an auxiliary mechanismfor returning the jack-A levers to a mid-position after each pick.

2. In a shedding mechanism, the combination with the pivotedjack-levers, of two sets of hooks, one arranged above andk the otherbelow the pivot-point of the jack-levers, each set comprising a pair ofhooks, and each of such pairs having a single connection with ajack-lever, means for engaging and moving the hooks to effect acorresponding movement ofthe jack-levers to which they are connected, apattern mechanism for moving selected hooks from the path of travel ofsaid engaging means, and an auxiliary mechanism for returning thejack-levers to a midposition after each operation.

3. In a shedding mechanism, the combination with the pivotedjack-levers, of two sets of hooks, one arranged above and the otherbelow the pivot-point of the jack-levers, and each set comprising a pairot' hooks, mating hooks ot' each pair having a single connec tion Withthe jack-levers, means for simultaneously engaging and moving one of theupper and one of the lower pairs of hooks, a pattern mechanism formoving selected hooks to inoperative position, and an auxiliarymechanism for returning` the jack-levers to a mid-position after eachoperation.

4. In a shedding' mechanism, the combination with the pivotedjack-levers, of two sets of hooks, one arranged above and the otherbelow the pivot-point of the jack-levers, and each set comprising a pairof hooks, a hookbar connecting each pair of hooks to a jacklever, knivesarranged `in pairs for operating on the hooks, means for simultaneouslyoperating said knives to engage one of the upper and one of the lowerpairs of hooks, a pattern mechanism for moving selected hooks toinoperative position, and an auxiliary mechanism for returning thejack-levers to a mid position after each operation.

5. In a shedding mechanism, the combination with the jack-levers pivotedintermediate ot' their length, of hooks arranged inupper and lowerpairs, a hook-bar connecting each pair to a j ack-lever, knives forengaging with and moving said hooks, vertically-disposed wires orneedles, each connected to the hooks of a pair, a card-cylinder andcards for operating on said wires or needles, and means for returningthe jack-levers to a mid-position after each operation.

6. In a shedding mechanism, the combination with the pivoted jack-lever,of an oper. ating mechanism connected to the jack-lever at each side ofits pivotal center, said mechanism comprising upper and lower pairs ofhooks, a single hook-bar connecting each pair to the levers, knives foroperating on said hooks, rack-bars arranged on each side of the machineand carrying said knives, pinions intermeshing with said rack-bars,mechanism 'for imparting a reciprocating movement to one of saidrack-bars, and pattern mechanism operatively connected to said hooks,substantially as specified.

7. In a shedding mechanism, the combination with the jack-levers pivotedintermediate of their length, of operating mechanism connected to eachside ot' the pivotal centers of the levers and each mechanism comprisinga pair of rack-bars guided on the frame, `a pinion mounted between andintermeshing with said bars, a rock-lever, a shaft carrying the same, anoperating-lever secured to said shaft, rods or links connecting theopposite links of said lever to one of the rack-bars of each set, knivescarried by the rack-bars, hooks adapted to be engaged by said knives,and hook-bars connecting said hooks to the jack-levers, substantially asspecified.

y S. In a shedding mechanism, the combination with the jack-levers, of aseries of hooks operatively connected to said levers, knives adapted toengage withand move said hooks, a series ot needles connected to saidhooks, a card-cylinder and cards adapted to engage the lower ends ofsaid hooks, each needle having a laterally-extended loop portion, and abar adapted to engage with all of lsaid loop portions, said bar beingadjustable to ei'ect a vertical movement of the hooks from the path oftravel of the knives. i

9. In a shedding mechanism, the combination with the jack-levers pivotedintermediate of their length, of thehooks, hook-bars connecting the sameto said levers, a series of transversely-disposed closing-bars guided inIOO the frame and adapted to engage with the means for impartingmovement to one of said Ia hook-bars, a pair of rock-levers, shaftscarryarms, substantially as specified. ing the same, links connectingthe levers and In testimony that I claim the foregoing as the bars, apair of transversely-disposed parmy own I have hereto affixed mysignature in 5 allel shafts, arms secured thereto and con- I thepresence of two Witnesses.

neeted to the respective rook-levers, segmen- ARTHUR C. FISCHER.

al racks lformedv on said arms and arranged Witnesses: 0n curves havingtheir centers coincident RICHARD FISCHER, with the centers of therespective shafts, and MAX FISCHER.

